STONE MATERIALS: Stone materials are often used for construction because they are strong, durable a d vey resistant to whether conditions.

1.1.Extracting and proccessing stone: Stone is extracted from natural deposits. Some types exist as large blocks, such as marble and granite from quarries, which must be cut into smaller pieces. Other materials, such as gravel and sand, are aggregates.

1.2.Natural stone: -Limestone is a porous sedimentary rock. It is often used for sculptures and buildings, as

1.PLASTIC MATERIALS: In general, plastic materials are a normal part of everyday life. They also play important roles in sectors such packaging, telecommunications, transport, construction, medicine, agriculture and information technology. Plastics consist of long chains of molecules, mostly made of the element “carbon”. These chains of macromolecules are called polymers, which is another name for plastics. Polymers are composed of smaller molecules called monomers. 1.1 THE ORIGIN OF PLASTICS:

A shadow copy is stored
because, the forwarding decision is made locally, at each input port,without
invoking the centralized routing processor. Also decentralized forwardingavoids
creating a forwarding processing bottleneck at a single point within therouter

In Linux, there are a few different partitioning command line tools we can use. One that supports both MBR and GPT partitioning is the parted tool. Parted can be used in two modes. The first is interactive, meaning we’re launched into a separate program, like when we use the less command. The second is command line, meaning you just run commands while still in your shell. We’re going to be using the interactive mode for most of this lesson. Before we do that let’s run a command to show what disks Read More

Types of levers: First grade: R, PA, F. Second grade: PA, R, F. Third grade: PA, F, R.Worm, usetransmitting rotary motion between two shafts that form an angle of 90 degrees (always input and output gear). Description: Has a single tooth-shaped wire thread. The gear is a toothed wheel. Each time a turn just a cog goes with it.Features:The relations of transmission of motion through right angles, high cost and mov. without noise.pinion-rack system:This is a straight-tooth pinion, a rack engarnazado.Read More